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Linking differential domain functions of the GS3 protein to natural variation of grain size in rice

lufuhao 添加于 2010-11-11 11:00 | 3327 次阅读 | 0 个评论

作者
Mao H, Sun S, Yao J, Wang C, Yu S, Xu C, Li X, Zhang Q
摘要
Grain yield in many cereal crops is largely determined by grain size. Here we report the genetic and molecular characterization of GS3, a major quantitative trait locus for grain size. It functions as a negative regulator of grain size and organ size. The wild-type isoform is composed of four putative domains: a plant-specific organ size regulation (OSR) domain in the N terminus, a transmembrane domain, a tumor necrosis factor receptor/nerve growth factor receptor (TNFR/NGFR) family cysteine-rich domain, and a von Willebrand factor type C (VWFC) in the C terminus. These domains function differentially in grain size regulation. The OSR domain is both necessary and sufficient for functioning as a negative regulator. The wild-type allele corresponds to medium grain. Loss of function of OSR results in long grain. The C-terminal TNFR/NGFR and VWFC domains show an inhibitory effect on the OSR function; loss-of-function mutations of these domains produced very short grain. This study linked the functional domains of the GS3 protein to natural variation of grain size in rice.
详细资料
- 文献种类:期刊
- 期刊名称: Proceedings of the National Academy of Sciences
- 期刊缩写: Proceedings of the National Academy of Sciences
- 期卷页: 2010年第107卷第45期 19579-19584页
- ISBN: 0027-8424
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